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The Bell System Practices

The Bell System Practices were a set of documents produced by the American Telephone and Telegraph Company to instruct employees on the proper use and maintenance of all kinds of telephone equipment.

As these materials span decades of the history of (what was at the time) the world's largest corporation, the quality varies widely. Some documents are carefully phototypeset originals, some are enlargements from microfilm, and still others are third-generation photocopies of typewritten originals.

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The Bell System Practices
AT&T Practices / Master Index
by AT&T Technologies Inc
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The Bell System Practices
PBX Systems / No. 756A / Equipment Diagram and Index
by Western Electric Company, Incorporated
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The Bell System Practices
124E Amplifier / (Western Electric)
by American Telephone & Telegraph Company
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The Bell System Practices
JK9 Circuit Pack, bus terminator B circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Numerical Index -- Division 00 / General Information
by American Telephone & Telegraph Company
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The Bell System Practices
Amplifiers / 100-Type Loudspeaker Sets / Description
by American Telephone & Telegraph Company
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The Bell System Practices
Numerical Index -- Division 000 / General Information
by Bell Communications Research (Bellcore)
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The Bell System Practices
Bell System Practices / General Plan
by American Telephone & Telegraph Company
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The Bell System Practices
Common Systems / Remote Testing -- Far End / For Step-by-Step, Crossbar No. 1, Crossbar No. 5, Panel or ESS Offices
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Symbols for Circuit Schematic Drawings
by American Telephone & Telegraph Company
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The Bell System Practices
Common Language / Facility Identification / Description
by American Telephone & Telegraph Company
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The Bell System Practices
General Safety Precautions / Radio, Television, and Carrier Equipment
by American Telephone & Telegraph Company
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The Bell System Practices
Electrostatic Discharge
by Bell Communications Research (Bellcore)
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The Bell System Practices
Equipment Test List / Electron Tubes
by American Telephone & Telegraph Company
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The Bell System Practices
A-120 Amplifier (McIntosh) / Description
by American Telephone & Telegraph Company
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The Bell System Practices
Power-Driven Rotary Selectors / Together with Associated Banks / Piece-Part Data and Replacement Procedures
by American Telephone & Telegraph Company
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The Bell System Practices
Common Systems / KS-19739,L1 Amplifier Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / Switched Maintenance Access System No. 4A / Far End Control Circuit / Fusing and Fuse Alarm Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems, 660 Communication Panel Circuits
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Principles of Firefighting and Use of Equipment
by American Telephone & Telegraph Company
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The Bell System Practices
Electronic Switching System / No. 3 / Network Trouble-Shooting Module
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
KS-16575-L1 Amplifier (McIntosh) / Tests, Adjustments and Requirements
by American Telephone & Telegraph Company
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The Bell System Practices
Electronic Switching System No. 3 / Office Data Tables Layout Specification / For Offices Equipped with the 3E3 Generic Program
by Western Electric Company, Incorporated
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The Bell System Practices
Common Systems / 5A Timer Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Cabling, Wiring and Connecting Terms / Definitions
by American Telephone & Telegraph Company
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The Bell System Practices
Common Language / Circuit Identification / Description
by American Telephone & Telegraph Company
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The Bell System Practices
KS-16575-L1 Amplifier (McIntosh) / Description
by American Telephone & Telegraph Company
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The Bell System Practices
Common Systems / For Use With No. 3 ESS Arranged With 2-Wire Features / Common Tape Paging Monitor (CPAGM)
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems, Tape Data Controller circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
FC205 Circuit Pack, vertical driver circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / Emergency Reporting System / Long Line Circuit / For Use With PBX No. 520 Type
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / KS-19219,L1 Amplifier Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Language Abbreviations -- Frames, Racks, Bays, Cabinets, and Associated Central Office Equipment
by American Telephone & Telegraph Company
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The Bell System Practices
General Safety Precautions / Breakdown Test Sets
by Pacific Northwest Bell Telephone Company
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The Bell System Practices
116B Amplifier
by American Telephone & Telegraph Company
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The Bell System Practices
106A Amplifier - Description
by American Telephone & Telegraph Company
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The Bell System Practices
A-120 Amplifier (McIntosh) / Initial and Routine Tests
by American Telephone & Telegraph Company
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The Bell System Practices
Selectors / KS-16201, KS-16202, KS-16203, and KS-19086 Types / Piece-Part Data and Replacement Procedures
by American Telephone & Telegraph Company
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The Bell System Practices
Task Oriented Practices / Master Alphabetical Index
by American Telephone & Telegraph Company
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The Bell System Practices
Common Systems / Far-End Test for Incoming Remote Test from LTD
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / 400A Tone Generator Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / J-99329A Control Unit (60A) Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
KS-20425 Equalizer-Amplifier System / Connections
by American Telephone & Telegraph Company
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The Bell System Practices
200-Type Selectors / Operation Test / Panel Machine Switching Offices
by American Telephone & Telegraph Company
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The Bell System Practices
Common Systems / 3ACC Maintenance Programmers' Manual
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / Switched Maintenance Access System No. 4A / Controller and Connector Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / Switched Maintenance Access System No. 4A/5B / Miscellaneous Fusing and Fuse Alarm Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / Switched Maintenance Access System No. 5A or 5B / Jack, Key, and Lamp Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Master Alphabetical Index / All Divisions
by American Telephone & Telegraph Company
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The Bell System Practices
Pictorial Wiring Diagrams / Methods Used
by American Telephone & Telegraph Company
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The Bell System Practices
Handling Working Telephone Circuits / Safety Precautions / General Methods
by American Telephone & Telegraph Company
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The Bell System Practices
118A Amplifier - Description
by American Telephone & Telegraph Company
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The Bell System Practices
A-120 Amplifier (McIntosh) / Tests, Adjustments and Requirements
by American Telephone & Telegraph Company
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The Bell System Practices
KS-20425 Amplifier System / Description
by American Telephone & Telegraph Company
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The Bell System Practices
FC181 Circuit Pack, peripheral decoder circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / Communication Panel for Unitized Terminal Equipment
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems / KS-19221,L1 Amplifier Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Language Location Identification / Idaho
by American Telephone & Telegraph Company
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The Bell System Practices
Common Systems / 3A CC / Command Manual
by American Telephone & Telegraph Company
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The Bell System Practices
Master Numerical Index / All Divisions
by American Telephone & Telegraph Company
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The Bell System Practices
Common Systems / 3A CC / Command Manual
by Bell Telephone Laboratories Incorporated
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The instruction set for the Western Electric 3A Processor, when used in 3ESS mode.
The Bell System Practices
Common Systems / Talk Trunk and Line Circuit Applique / No. 16 LTD, LSV and Key Telephone Systems
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
103C Amplifier
by American Telephone & Telegraph Company
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The Bell System Practices
103D Amplifier
by American Telephone & Telegraph Company
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The Bell System Practices
124A Amplifier
by American Telephone & Telegraph Company
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The Bell System Practices
124B Amplifier
by American Telephone & Telegraph Company
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The Bell System Practices
124C Amplifier
by American Telephone & Telegraph Company
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The Bell System Practices
Numerical Index -- Division 026 / Banks, Clutches, Commutators and Commutator Brushes, Elevator Apparatus, Multiple Brushes and Rods, and Trip Rods for Panel Offices / Circuit Breakers, Compensators, Contactors, Control Panels, Fuses and Mountings, Magnetic Switches, Selectors, and Starters
by AT&T Technologies Inc
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The Bell System Practices
Electronic Switching Systems, Common, MF Receiver Circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems, Teletypewriter Controller Unit circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Operations Support Systems, Common, SMAS 5A/B & RTS 5A, Control circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Common Systems, 48 Channel PCM Bank Type D4, Maintenance Bank, Application Schematic
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
JK5 Circuit Pack, serial peripheral interface A circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
FC201 Circuit Pack, 10 I/O subchannels -- bipolar interface circuit
by Bell Telephone Laboratories Incorporated
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The Bell System Practices
Electronic Switching System / No. 3 / Generic Program Map for PG-3H903
by Bell Telephone Laboratories Incorporated
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